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<script>
  // 数组转map 结构
  // 1. 二维数组 转 map (key-value)
  var fn = function () { };
  var arr = [1, 2, 3];
  var o = { a: 1, b: 2 };
  var reg = /\s/ig;

  var list = [[100, 200], ["hello", "world"], [true, true], [null, null], [fn, fn], [arr, arr], [o, o], [reg, reg]];

  var m = new Map();
  list.forEach(item => { // [100,200]
    var [key, val] = item;
    m.set(key, val);
  })
  console.log(m);

  // 简单
  var m = new Map(list);
  console.log(m);


  // map结构转数组
  var arr = [...m];
  console.log(arr);

</script>

</html>